I am in need of a new 9 speed cassette and notice that Performance has theirs on sale for $17 any comments or opinions are welcome. Thanks

I didn't use it myself. I installed their 8 speed Forte cassette on my wife's bike to use with non-ESP (Shimano compatible) Grip Shift. She rode it for about two years, but that's not saying much since she doesn't exactly pile the miles one and isn't a very agressive pedaler. But it shifted pretty well and (I hope she doesn't read this) if anyone can cludge up a shift, she can, and she never suffered any broken teeth or bent cogs.